1. The reason for the printed version: the technical level of domestic gravure manufacturers varies greatly. Due to the current limitation on the delivery time of printing, printing companies have less time for platemaking enterprises. In the last link of platemaking , That is, the polishing process is easy to be negligent, and this negligence often causes fog problems in printing: In addition, after a long printing and abrasion by the metal scraper, the non-graphic text of the printing plate produces shallow dots , So the foggy version of the problem arises. 2. Reasons for printing films: At present, there are many manufacturers of BOPP films in China. Due to the differences in the processes, formulations and additives added by each manufacturer, some films are not flexible enough. During the long-term printing process, they will The abrasion of the printing plate causes the printing plate to produce shallow dots, and gradually causes the problem of fogging. 3. The reason of the printing environment: the printing environment has a great influence on the quality of the gravure printing products, especially in seasons where the temperature and humidity change greatly and in the harsh printing environment (such as low temperature and low humidity) Easy to produce static pollution). 4. The cause of ink: other external reasons are easier to solve. The problem of fogging caused by the ink itself is difficult to solve. This is a problem faced by the ink industry. Second, how to solve the fogging problem caused by the reason of the gravure ink itself 1. Try to design a suitable resin ratio according to the different characteristics of raw materials: The variety of raw materials is different, and the difference between them is very large. Even if the same pigment variety is different after post-processing, its own properties are also very different. This requires the formula designer of the composite ink to design the formula of the composite ink. Fully tested? This difference. Due to the different requirements of various colors of ink in the printing process, when designing the formula, the proportion of various synthetic resins in the ink formula should be designed according to the characteristics of the pigment, that is, oil absorption, coloring power, dispersion performance, etc. , This can be determined by experiment. In general, serious fogging problems can often be solved by improving the fluidity of the ink. The reason is that after improving the fluidity of the ink, that is, low viscosity printing. Reduce the impact of ink on the blade, so that the blade can clean the blank part of the ink very cleanly. 2. Scientific application of body pigments Adding body pigments (such as YMT ultrafine powder, YMT ultrafine barium sulfate, CC-65 powder, FH-95 powder, etc.) to the formula is not only a question of reducing costs. After adding body pigments, the The pigment-encapsulated resin further strengthens the body of the ink, reduces the viscosity of the ink at the same printing viscosity, and improves the scraping performance of the doctor blade. 3. Use wax powder and OK-412 matte powder to solve the fog problem Wax powder and matte powder OK-412 is an effective additive to reduce the fogging problem. Its particles are easily free on the surface of the ink, which enhances the scraping performance of the scraper. However, the method of adding wax powder and OK-412 matte powder to many manufacturers often fails to solve the problem of plate fog. It is recommended that the wax powder and OK-412 matte powder be made into semi-finished products, and the fineness of the ink grinding is qualified After that, after high-speed dispersion and addition, and without grinding, it will reduce the effect of solving the haze problem. 4. Use suitable wet dispersion additives to improve the compatibility of pigments and synthetic resins The purpose of adding wetting and dispersing additives in the formulation is to solve the problems in the formulation system, including poor pigment dispersion, poor coating of various synthetic resins, and poor stability of the system itself, and these problems are solved If it is not good, it will often cause the problem of plate fog. It is recommended to use L-18 dispersant and GK-208 auxiliary to disperse black, blue, red and other pigments. 5. Adopt additives to solve fog problems According to the foreign experience in solving the problem of plate fog in high-speed printing, it is recommended to use AK-505 additive, which is a kind of reducing the affinity of the composite ink and the plate layer, because the ink is not easy to adhere to the plate. The current country? Blade 喑 ⪣ 眣 眯 Ч? Already? Nbsp; 6. Adopt new resin system to design formula As mentioned earlier, CL-PP composite inks are more prone to fogging problems. It is recommended to use BK-6380 resin system to replace CL-PP system. Plastic Cutting Board,Marble Cutting Board,Personalised Chopping Board,Olive Cutting Board Yangjiang Yado Kitchen Industry Co., Ltd. , https://www.yadokitchen.com